Cement block molding apparatus



June 1942- w. F. JURGENSON 03 CEMENT BLOCK MOLDING APPARATUS Filed March31, 1941 d l g inventor IflilliamEJur enscm.

Patented June 30, 1942 UNITED STATES PATENT OFFICE 2,288,403 CEMENTBLOCK MOLDING APPARATUS William Frederick Jurgenson, Hamilton, Ontario,

Canada Application March 31, 1941, Serial No. 385,994 1 Claim. (Cl.25-41) My invention relates to improvements in cement brick or blockmaking apparatus and the object of the invention is to provide a simplemanually actuated device whereby cement bricks or blocks can beconveniently and rapidly molded.

A particular object of my invention is to devise such an apparatus thatcan be conveniently operated by one man and wherein a plurality ofblocks is simultaneously molded during each complete operation of thedevice. A further ob- L ject of my invention is to furnish a devicewherein the molding cell structure can be readily secured to and removedfrom the apparatus so that different sizes or shapes of molding cellscan be inserted into the device.

With the foregoing and other objects in view as shall further appear, myinvention consists of a cement brick or block making apparatusconstructed and arranged all as hereinafter more particularly describedand illustrated in the accompanying drawing, in which:

Figure 1 is a plan view of my apparatus.

Figure 2 is a front elevational view thereof.

Figure 3 is an end elevational view thereof.

Figure 4 is a vertical cross-sectional view taken through the line 44,Figure 1.

Figure 5 is a perspective view of the removable brick supporting plateas removed from the apparatus and having a plurality of freshly moldedcement bricks thereon.

Like characters of reference indicate corresponding parts in thedifferent views of the drawmg.

The apparatus comprises a rectangular frame having four angle bar cornerposts I extending upwardly from two parallel base plates 2. A centralstrut 3 extends between the two base plates 2. The upper ends of thecorner posts I support a molding cell frame comprised of a plurality oflongitudinal and transverse wall members 4 and 5 which divide the frameinto a plurality of brick molding cells 6. The outer longitudinal walls4 forming the sides of the cell frame have their ends I extending beyondthe outer faces of the outer side walls 5 and are adapted to restagainst the sides of the corner posts I and to be secured thereto by aplurality of bolts 8. The outer faces of the two outer walls 5 also restagainst the corner posts I so that the cell frame is rigidly mountedwithin the upper ends of the four corner posts I. The cells 6 are openat their tops and bottoms.

A vertically reciprocable cement brick supporting frame is carriedwithin the confines of the four corner posts I underneath the moldingcell structure. The frame comprises a plurality of longitudinal andtransverse cross members 9 and II) which are suitably bolted or weldedtogether and the frame is of such dimensions that it is a sliding fitwithin the confines of the four corner posts I and of substantially thesame area as the area of the molding cell structure positionedthereabove.

The cement brick supporting frame is slidably mounted for verticalmovement upon a pair of telescopic members positioned at the ends of theapparatus. Such telescopic members each consist of a vertical tongue I Isecured at its lower end to a base plate 2 and projecting upwardly to beencased within a sleeve I2 secured at its upper end to one of the outertransverse members 9 of the cement brick supporting frame. The membersII are a close freely sliding fit within the sleeves I2 so. that thereis no possibility of the frame becoming crossed or jammed in itsreciprocating movement. The brick supporting frame is normally urgedinto an upper position bearing against the bottom of the cell structureby a pair of springs I3 positioned at the ends of the apparatus and eachextending from a pair of cross braces I4 between the corner posts I tosuitable studs I5 projecting outwardly from the outer faces of thesleeves I2.

The cement brick supporting frame is reciprocably actuated by means of aswingable lever I 6 positioned centrally of the apparatus and having itsrear end pivoted upon a suitably positioned bracket I1 carried upon ahorizontal cross bar I8 extending between two of the corner posts I. Theforward end of the lever I6 is formed with a foot plate I9 so that thelever can be pressed downwardly by the foot of the operator to move thecement brick supporting frame downwardly against the tension of thesprings I3.

To retain the lever I6 and the brick supporting frame in the lowerposition against the resiliency of the springs I3, a latch 20 may beused. Such latch can be swingably carried upon a bar 2I extending acrossthe bottom of the structure between the base plates 2 to be movable intoretaining engagement with the foot plate I9 at the will of the operator.The lever I6 is connected to the sleeves I2 through the medium of a pairof bars 22 extending between the two sleeves and between which the leverI6 is contained. The bars 22 carry rollers 23 which engage the upper andlower faces of the lever I6.

The operation of my apparatus is as follows:

A plate 24 of substantially the same dimensions as the dimensions of themolding cell structure is slid into the apparatus to rest upon the topof the cement brick supporting frame and when such frame is in the upperposition, as illustrated in Figure 3, the plate 24 is held tightlyagainst the bottom of the cell structure. The cement or concrete mixtureis poured into the open top of the cell structure, as illustrated inFigure 1, until such cells are filled and at which time the containedcement mixture can be levelled oif with a levelling board scraped acrossthe top of the cell structure. The cement mixture is of such aconsistency that it commences to solidify practically as soon as it ispoured. As soon as the contained cement mixture has solidified to asufficient degree the lever [B is pressed downwardly and through itsengagement with the roller 23 upon the lower bar 22 carried between thesleeves lZ, the sleeves I2 and the cement brick supporting frame aremoved downwardly in unison with the lever I5. As the plate 24 movesdownwardly freshly formed cement bricks 25 which rest upon the upperface of the plate 24 also move downwardly out of the cells 6, all asillustrated in Figure 4.

The plate 24 with its freshly formed cement bricks is then slid out ofthe apparatus and placed within any suitable rack structure for thecement bricks to dry and cure. Water is thrown or hosed over the cellstructure 6 to wash off any cement or sand left adhering thereto and afresh plate 24 is inserted into the apparatus and the lever I6 and thecement block supporting structure allowed to move upwardly under theinfiuence of the springs l3 so that the newly inserted plate 2 ispositioned underneath the cell structure.

A fresh batch of cement mixture is then poured into the cells and themolding operation repeated. If it is desired to make bricks or blocks ofshapes or dimensions other than the shape and dimensions of the cells inthe apparatus, the cell structure can be readily removed by removal ofthe bolts 8 securing the cell structure to the corner posts I and a newcell structure inserted.

From the foregoing description it will be ap- 2,2ss,aos

preciated that I have devised a very simple and readily actuatableapparatus for molding cement bricks which can be readily operated by oneman, and although I have shown and described a particular embodiment ofmy invention, it is to be understood that I can make such changes andalterations therein as I may from time to time deem necessary withoutdeparting from the spirit of my invention as set forth in the appendedclaim.

What I claim as my invention is:

In a block molding apparatus of the character described, a frame, fourvertical corner posts in said frame, a molding cell structure open atits top and bottom and detachably mounted within the confines of theupper end portions of the corner posts, a reciprocable member containedwithin the confines of the corner posts and movable towards and awayfrom the bottom of the molding cell structure, a removable blocksupporting plate of substantially the same dimensions as the bottom ofthe molding cell structure and resting upon the top of the reciprocablemember, a pair of vertical telescopic members in each end of the framebetween the corner posts and having their lower ends secured to theframe and their upper ends secured to the reciprocable member, a manuallactuable vertical swingable lever mounted within the frame of theapparatus and having one end pivoted at one side of the frame and theother free end carrying a foot plate and projecting from the oppositeside of the frame, a pair of bars extending between the upper telescopicmembers and between which the swingable lever extends and by means ofwhich the movement of the lever is transmitted to the upper telescopicmembers, a spring extending from the frame to one of the movabletelescopic guide members and manually urging the guide members and blocksupporting plate upwardly, and a latch carried upon the lower portion ofthe frame, and adapted to be manually engaged with the lever to retainthe lever in the lowermost position against the influence of the spring.

WILLIAM FREDERICK JURGENSON.

